Coin

The world uses a currency based on coins made of gold, silver and copper. The value of each coin is determined by a bank and imprinted on the object using a seal. In rarer cases, gold, silver or copper bars are used. These are sealed by a bank in the same manner, with a number indicating the amount of coins that the bar is worth.
The general consensus is that one well-printed silver coin represents the value of 100 copper coins, and one well-printed gold coin is worth 100 silver coins. Because the market price of gold, silver, and copper changes, the price of these coins can change over time.
Though most banks aim to adhere to the same quality and quantity measures, arguments about the quality of a bank are no uncommon. Dwarves might not blatantly believe that golden coins printed by an Elven bank are of the same quality as their Dwarven counterparts.